Bolt-clipper.



PATENTED SEPT. 6, 1904.

F. A. ROBERTS. BOLT. CLIPPER.

APPLICATION FILED mm: 10, 1904.

2 SHBETSSHEET 1.

N0 MODEI PATENTED SEPT. 6, 1904-.

' P. A. ROBERTS.

UBOLT CLIPPER.

APPLICATION IILBD JUNE 10, 1904.

N0 MODEL 2 SHEETS-SHEET 2.

4 UNITED STATES I Patented September 6,1904.

, PATENT OFFICE.

BOLT-CLIPPER.

SPECIFICATION forming part of Letters Patent No, 769,357, dated September 6, 1904.

I Application filed June 10, 1904. Serial No. 211,961. (No model.)

To all whom, it may concern.-

Be it known that I, FREDERICK A. ROBERTS,

'a citizen of the United States, residing in Somerville, in the county of Mi'ddlesex and State of Massachusetts, have invented certain new and useful Improvements in Bolt-Clippers, of which the following is a specification,

This invention relates to bolt-clippers, sometimes termed bolt-cutters, such tools being used principally for clipping or cutting bolts, rivets, wires, rods, cables, and the like.

The invention relates to that portion of the device whereby the handles or levers and'the cutting-jaws are adjusted from time to time sections shown in horizontal section.

as the cutters wear or for any other purposeand whereby when the tool is opened the adjusting-section is held securely, thus. preventing relative movement'and rattling;

The principal objects of my improved adjustment are to attain as high a degree of simplicity as possible and to lengthenthedurability of the tool by reducing to a minimum the wear on the jaw and preventing digging into the jaw, a fault which has been much lines indicate the position of one of the jaws and adjusting-sections when the device has been adjusted by means of the cutters having become worn. In the first two figures the tool is represented with the jaw closed. Fig.

3 is a side View of the same. Fig. 4 is a section taken on line 4 4:, Fig. 2. Fig. 5 is a plan view showing the jaws open.

Similar letters of reference indicate corresponding parts.

eta represent the operating handles or levers, pivoted together at their inner'ends at b.

c 0 represent the cutting-jaws, provided at their outer ends with the cutters d '03, said out Dotted sides of the recesses 70.

ting-jaws being connected by a lock-plate (2, having holes j, which correspond in shape withthe holes in gear-shaped nuts 9, whereby said nuts are prevented from turning. These nuts are on bolts h, the said bolts, nuts,

lock-plate, and cutting-jaws being constructed able bolt or pivot m with the handle a on that side andat its forward end by a bolt'orpivot p with the rear end of the jaw on the same side. Thus the adjusting-section n and jaw c, in connection with the pivots or bolts 7t, 19, and m, constitute practically a toggle.

Each adjusting-section n is vertically bored to receive a bolt 4, whose shank is flattened on its opposite sides, as shown in Fig. 2, and extends through the chamber or hollow -portion in the adjusting-section n. in a correspondingly-shaped hole in the cam or eccentric 7, located in the interior of the section, the periphery of said cam being adapted to fit in the recess is and the cam being between said recess in and-the outer wall of the section 12,. This outer wall is provided with a horizontal hole t, through which there extends a strong hook s, the shank of which is screw-theaded to receive a suitable nut 10 and the inner or hooked end of which fits into the hook-shaped recess l. The cams r and hooks sin each section a are similar.

Fig. 2 represents in full lines a newtool closedbefore the cutters have become worn. The cams therefore have their broad sides swung outward toward the outer walls or edges of the adjusting-sections, while their narrowest portions lie in and bear against the As the cutters become worn the bolts 9 are rotated, turning the cams, with the eflect of swinging their broad portions toward andinto the recesses 70, thus forcing outward the adjusting-sections a (which swing on the pivots m) and also swinging outward the rear or inner ends of the jaw 0, all as shown in dotted lines in Fig.2, said dotted lines being illustrated in connection with but one of the adjustments, although practically both jaws would be adjusted at the same time. The extreme limit of wear would be provided for when the broadest portions of the cams were swung into the recesses vin other words, when the cams were in exactly the reversed position from that indicated in full lines in Fig. 2. In whatever position the cams may be turned the handles are operated in exactly the same manner. hooks. s serve to bind the handles or levers-a and the adjusting-sections together, so that each adjusting-section is firmly secured to and moves with the corresponding handle. This prevents all relative movement or rattling. Of course when adjustment is to be made the nuts or are loosened.

The bolts 39 and q are preferably connected by lock-plates o, similar to the lock-plates a, above described.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a bolt-clipper of the character described, the handles or operating-levers; the cutting-jaws; the adjusting-sections a pivotally connected at their rear ends with the han- The strong dles, for the purpose set forth.

3. In a bolt-clipper of the character described, the cutting-jaws; the handles or operating-levers (I/ provided on their outer edges with the recesses Z1; the adjusting-sections n pivot-ally connected at their rear ends with the handles and at their outer ends with the cutting-jaws; the cams in the adjusting-sections; the bolts 9 in the adjusting-sections, said bolts rotating the cams against said recessed portions; and adjustable means for holding said ad j Listing-sections in engagement with the corresponding handles, for the purpose set forth.

4. In a bolt-clipper of the character described, the cutting-jaws, the handles or operating-levers a provided on their outer edges with the hook-shaped recesses Z; the adjusting-sections n pivotally connected at their rear ends to the handles and at their outer ends to the cutting-jaws; cams supported by the adjusting-sections and adapted to bear against the handles a; means for operating said cams; and adjustable hooks s extending through the adjusting-sections into the said hook-shaped recesses, for the purpose set forth.

In testimony whereof .l have signed my name to this specification in the presence of two subscribing witnesses.

FREDERICK A. ROBERTS.

\Vitnesses:

HENRY W. WILLIAMS, A. K. Hoop. 

